[SDK-483] upgrade React Native to version 0.85.3

[lposen]

🔹 JIRA Ticket(s) if any

• SDK-483

✏️ Description

Please provide a brief description of what this pull request does.

[qltysh]

Coverage Impact

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[github-actions]

Lines	Statements	Branches	Functions
	68.83% (519/754)	56.11% (202/360)	64.82% (164/253)

[Copilot]

Pull request overview

This PR updates the SDK’s development and example app environment to React Native 0.85.3, refreshing the corresponding JS tooling and native build wrappers so the repo aligns with the new RN baseline.

Changes:

• Bump react-native (and related @react-native/* tooling) to 0.85.3 across the workspace.
• Switch Jest configuration to use the new standalone preset @react-native/jest-preset.
• Update example native tooling (iOS project references, Gradle wrapper scripts/version) and Ruby stdlib gem dependencies for newer Ruby versions.

Reviewed changes

Copilot reviewed 8 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
yarn.lock	Regenerated lockfile reflecting RN 0.85.3 and related dependency graph changes.
package.json	Pins RN + @react-native/* dev tooling to 0.85.3 and adds @react-native/jest-preset.
jest.config.js	Updates Jest preset to @react-native/jest-preset.
example/package.json	Updates example app RN/tooling versions to 0.85.3 and adds @react-native/jest-preset.
example/jest.config.js	Updates example Jest preset to @react-native/jest-preset.
example/ios/ReactNativeSdkExample.xcodeproj/project.pbxproj	Updates CocoaPods-generated file references/IDs after dependency upgrade.
example/Gemfile	Adds nkf gem (Ruby stdlib extraction compatibility).
example/android/gradlew.bat	Updates Gradle wrapper invocation style to java -jar ....
example/android/gradlew	Updates Gradle wrapper invocation style to java -jar ... and removes unused classpath handling.
example/android/gradle/wrapper/gradle-wrapper.properties	Bumps Gradle distribution to 9.3.1 for the example Android project.

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